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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-09-18 22:46:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-19 11:24:18 -0700 |
| commit | 389a3c02496dd1b399bb0efd005e9fa2be24e9ee (patch) | |
| tree | 2c3189438f24c8b84ec36f6259b0dac798a1d9f6 | |
| parent | 248bdd5efca5a113cbf443a993c69e53d370236b (diff) | |
| download | lwn-389a3c02496dd1b399bb0efd005e9fa2be24e9ee.tar.gz lwn-389a3c02496dd1b399bb0efd005e9fa2be24e9ee.zip | |
xen: don't bother trying to set cr4
Xen ignores all updates to cr4, and some versions will kill the domain if
you try to change its value. Just ignore all changes.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/i386/xen/enlighten.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/i386/xen/enlighten.c b/arch/i386/xen/enlighten.c index f0c37511d8da..f01bfcd4bdee 100644 --- a/arch/i386/xen/enlighten.c +++ b/arch/i386/xen/enlighten.c @@ -623,8 +623,8 @@ static unsigned long xen_read_cr2_direct(void) static void xen_write_cr4(unsigned long cr4) { - /* never allow TSC to be disabled */ - native_write_cr4(cr4 & ~X86_CR4_TSD); + /* Just ignore cr4 changes; Xen doesn't allow us to do + anything anyway. */ } static unsigned long xen_read_cr3(void) |